ThreadSanitizer: data race rbtdb.c:1960 in decrement_reference

• Binary: named
• Commit: c5b6f215
• Tests: autosign

WARNING: ThreadSanitizer: data race (pid=45980)
  Read of size 8 at 0x7b200001bbc8 by thread T6 (mutexes: write M1014290113594662432):
    #0 decrement_reference rbtdb.c:1960 (libdns.1503.dylib:x86_64+0xc2c09)
    #1 detachnode rbtdb.c:5197 (libdns.1503.dylib:x86_64+0xb7024)
    #2 dns_db_detachnode db.c:606 (libdns.1503.dylib:x86_64+0x2bad0)
    #3 resquery_response resolver.c:6410 (libdns.1503.dylib:x86_64+0x142c04)
    #4 run task.c:1134 (libisc.1503.dylib:x86_64+0x2c9e1)

  Previous write of size 8 at 0x7b200001bbc8 by thread T5 (mutexes: write M1035682211824674264):
    #0 dns_rbt_addnode rbt.c (libdns.1503.dylib:x86_64+0xaa632)
    #1 findnodeintree rbtdb.c:2739 (libdns.1503.dylib:x86_64+0xc896a)
    #2 findnode rbtdb.c:2784 (libdns.1503.dylib:x86_64+0xb532b)
    #3 dns_db_findnode db.c:447 (libdns.1503.dylib:x86_64+0x2b158)
    #4 resquery_response resolver.c:6629 (libdns.1503.dylib:x86_64+0x1432d4)
    #5 run task.c:1134 (libisc.1503.dylib:x86_64+0x2c9e1)

  Location is heap block of size 116 at 0x7b200001bb80 allocated by thread T6:
    #0 malloc <null>:6886992 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x4e65a)
    #1 default_memalloc mem.c:685 (libisc.1503.dylib:x86_64+0x17ae1)
    #2 dns_rbt_addnode rbt.c:1274 (libdns.1503.dylib:x86_64+0xa98fa)
    #3 findnodeintree rbtdb.c:2739 (libdns.1503.dylib:x86_64+0xc896a)
    #4 findnode rbtdb.c:2784 (libdns.1503.dylib:x86_64+0xb532b)
    #5 dns_db_findnode db.c:447 (libdns.1503.dylib:x86_64+0x2b158)
    #6 resquery_response resolver.c:6018 (libdns.1503.dylib:x86_64+0x141e7a)
    #7 run task.c:1134 (libisc.1503.dylib:x86_64+0x2c9e1)

  Mutex M1014290113594662432 is already destroyed.

  Mutex M1035682211824674264 is already destroyed.

  Thread T6 (tid=4654359, running) created by main thread at:
    #0 pthread_create <null>:6887040 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x2a9cd)
    #1 isc_thread_create thread.c:75 (libisc.1503.dylib:x86_64+0x46d1c)
    #2 main main.c:902 (named:x86_64+0x10000ad16)

  Thread T5 (tid=4654358, running) created by main thread at:
    #0 pthread_create <null>:6887040 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x2a9cd)
    #1 isc_thread_create thread.c:75 (libisc.1503.dylib:x86_64+0x46d1c)
    #2 main main.c:902 (named:x86_64+0x10000ad16)

SUMMARY: ThreadSanitizer: data race rbtdb.c:1960 in decrement_reference